On 2018/8/30 下午6:01, Pierre Couderc wrote: > > > On 08/30/2018 11:35 AM, Qu Wenruo wrote: >> >> On 2018/8/30 下午5:13, Pierre Couderc wrote: >>> Trying to install a RAID1 on a debian stretch, I made some mistake and >>> got this, after installing on disk1 and trying to add second disk : >>> >>> >>> root@server:~# fdisk -l >>> Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors >>> Units: sectors of 1 * 512 =12 bytes >>> Sector size (logical/physical): 512 bytes / 512 bytes >>> I/O size (minimum/optimal): 512 bytes / 512 bytes >>> Disklabel type: dos >>> Disk identifier: 0x2a799300 >>> >>> Device Boot Start End Sectors Size Id Type >>> /dev/sda1 * 2048 3907028991 3907026944 1.8T 83 Linux >>> >>> >>> Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors >>> Units: sectors of 1 * 512 =12 bytes >>> Sector size (logical/physical): 512 bytes / 512 bytes >>> I/O size (minimum/optimal): 512 bytes / 512 bytes >>> Disklabel type: dos >>> Disk identifier: 0x9770f6fa >>> >>> Device Boot Start End Sectors Size Id Type >>> /dev/sdb1 * 2048 3907029167 3907027120 1.8T 5 Extended >>> >>> >>> And : >>> >>> root@server:~# btrfs fi show >>> Label: none uuid: eed65d24-6501-4991-94bd-6c3baf2af1ed >>> Total devices 2 FS bytes used 1.10GiB >>> devid 1 size 1.82TiB used 4.02GiB path /dev/sda1 >>> devid 2 size 1.00KiB used 0.00B path /dev/sdb1 >>> >>> ... >>> >>> My purpose is a simple RAID1 main fs, with bootable flag on the 2 disks >>> in prder to start in degraded mode.... >>> How to get out ofr that...? >> The 2nd device is indeed strange. >> >> Considering how old packages Debian tends to deliver, it should be some >> old btrfs-progs. >> >> You could just boot into the system and execute the following commands: >> >> # btrfs device remove 2 <mnt> > This works fine. >> >> Then add a new real device to the fs >> >> # btrfs device add <new device> <mnt> >> >> > Thnk you, this : > > btrfs device add /dev/sdb1 / > > seems to work but gives me the same : > > root@server:~# btrfs fi show > Label: none uuid: eed65d24-6501-4991-94bd-6c3baf2af1ed > Total devices 2 FS bytes used 1.10GiB > devid 1 size 1.82TiB used 4.02GiB path /dev/sda1 > devid 2 size 1.00KiB used 0.00B path /dev/sdb1 > > So I need to "prepare" or format /dev/sdb before adding /dev/sdb1 > I have tried to format /dev/sdb and it works : What's the output of lsblk command? If it's 2T (1.8T) show in lsblk, then in above case you could fix it by resize that device by: # btrfs resize 2:max <mnt> Thanks, Qu > root@server:~# btrfs fi show > Label: none uuid: eed65d24-6501-4991-94bd-6c3baf2af1ed > Total devices 2 FS bytes used 1.10GiB > devid 1 size 1.82TiB used 4.02GiB path /dev/sda1 > devid 2 size 1.82TiB used 0.00B path /dev/sdb > > but I have no partition table and no booot flag for degraded mode.... > > >
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